The engine frame is of the girder pattern, cast in one piece, and
contains the guides for cross-head and pillow block bearing. It also
forms front head of cylinder to which it is firmly bolted. The cylinder
is supported and firmly attached to the large feed water heater, and
both cylinder and frame are entirely disconnected from the boiler. The
heater forms a support for front end of boiler. The engine is placed
diagonally with the boiler, allowing the crank shaft to pass over the
fire box end. This permits the use of a very large band wheel. The
outer end of shaft is supported by a pillow block attached to a large
bracket bolted to the boiler.
The locomotive style of boiler has a large steam dome in center and an
ash pan under fire box. It is supported upon the long wooden skids by
brackets bolted to the sides of boiler, the heater being also bolted to
the skids.
The independent pump is connected to the heater, and bolted to skid.
The engine has a Plain Slide Valve, which receives its motion from the
rocker arm, operated by the eccentric and rod. It has Governor, Steam
Gauge, Pop Valve and all necessary fittings. These engines range in
size from 20 to 30 horse-power, and are extensively used for driving
portable saw mills.